My 7 and 5 year old boys "got" the concept right
away. They loved building the Lego-like ships, and enjoy playing with
them even when not playing Battleship. But there were some serious flaws
that make this unsuitable for kids at the low end of the suggested age
range.

The new gameplay lets each ship attack once for each "hit"
left until it sinks. On your turn, you pick one ship and then fire as
many times as it is able. Advanced rules let you modify your ships so
that some have more hits, and therefore more opportunities to attack.
Instead of a basic 5,4,4,3,2 configuration, you might make a 10-hit mega
ship and spend the rest of your points on 2-hit escorts.